.layui-tab ul.layui-tab-title li:nth-child(1) i {
    display: none;
}
.layui-nav-img{
    width: 50px;
    height: 50px;
}
.layui-tab{
    margin-left: 200px;
}
@media screen and (max-width: 800px)
{
.layui-layout-admin .layui-side {
    top: 60px;
    width: 200px;
    overflow-x: hidden;
    display: none;
}
.layui-tab{
    margin-left: 0;
    left: 0;
}
    .layui-layout-admin .layui-footer {
        left: 0;
        margin-left: 0;
    }

}